Once there was a mother duck. She was sitting on seven little eggs. One day, the eggs started to open. One by one, six little yellow ducklings came out of the eggs. There was still one egg left. The mother duck sat on that egg again. Two days later, out came a duckling. But this duckling wasn't yellow. It was grey, and it had a long, thin neck. The other ducklings didn't like the grey duckling. They didn't want to play with him. They said he was ugly. The little ugly duckling was sad. Summer came. The ducklings all grew bigger, and the ugly duckling was the biggest. One day they went to a farm. A chicken bit him, and the farmer kicked him. The ugly duckling felt terrible.

The ugly duckling ran away. He went to the tall grass by the lake to live by himself. He felt lonely every day. Autumn came. The ugly duckling got bigger and bigger. He swam by himself every day, so he got stronger, too. Then winter came. It was very cold, and there was ice on the lake. The ugly duckling had no one to keep him warm. He felt very cold.

Finally, spring came. One day, a little girl came to the lake with her mother. “Look at the swan," she said, "It's beautiful!” The ugly duckling looked at himself in the water. He wasn't a duckling. He was a swan, a white swan with a long neck. He wasn't ugly. He was beautiful!

A farmer is working on his farm. Suddenly, he sees a rabbit running out. The rabbit rushes(冲) to the tree and dies(死亡). He catches the rabbit and thinks, “The rabbit is so stupid(愚蠢的). It’s so easy to get it. I don’t want to work any more.”

The next day is a rainy day. “Rabbits will sleep in the hole. I’m going to sleep too,” he thinks. On the third day, the sun comes out. He sits under the tree and waits for rabbits. The farmer keeps waiting for rabbits. He thinks rabbits will come tomorrow.

On the fifth day, no rabbit comes. The farmer is very hungry. An old man gives him some food and says, “Don’t wait for windfalls. ”

Yu Gong wanted to remove the mountains in front of his house. His family all supported him. But his wife felt it was too difficult. Everyone said they could do it if they worked together and kept going every day. Then they worked hard all year. Zhi Sou thought they were crazy to remove the mountains. But Yu Gong answered that he had sons and grandsons to go on working year after year. They would remove the mountains one day! At last, the Jade Emperor was touched by Yu Gong’s story. He helped them remove the two mountains.

习主席在2023新年贺词中说到：“只要有愚公移山的志气、滴水穿石的毅力，脚踏实地，埋头苦干，积跬步以至千里，就一定能够把宏伟目标变为美好现实。”请根据短文回答问题。